/*
 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
 * Permission to use, copy, modify, and distribute this software for
 * any purpose and without fee is hereby granted, provided that the above
 * copyright notice appear in all copies and that both the copyright notice
 * and this permission notice appear in supporting documentation, and that
 * the name of Silicon Graphics, Inc. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission.
 *
 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * US Government Users Restricted Rights
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
 * clause at DFARS 252.227-7013 and/or in similar or successor
 * clauses in the FAR or the DOD or NASA FAR Supplement.
 * Unpublished-- rights reserved under the copyright laws of the
 * United States.  Contractor/manufacturer is Silicon Graphics,
 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
 *
 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
 */
package cglesson.lesson01;

import org.lwjgl.opengl.GL11;

import cglesson.CGExample;


/**
 * This is a simple, introductory OpenGL program.
 * Ported by
 * @author <a href="mailto:eriq.adams@gmail.com">Eriq Muhammad Adams J.</a>
 */
public class Hello extends CGExample {

	public static void main(String[] args) {
		Hello example = new Hello();
		example.start(250, 250, false, "Hello World");
	}

	@Override
	public void update(int delta) {

	}

	@Override
	public void init() {
		/* select clearing color */
		GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

		/* initialize viewing values */
		GL11.glMatrixMode(GL11.GL_PROJECTION);
		GL11.glLoadIdentity();
		GL11.glOrtho(0.0f, 1.0, 0.0, 1.0, -1.0, 1.0);
	}

	@Override
	public void render() {
		/* clear color to black */
		GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
		/* clear all pixels */
		GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);

		/*
		 * draw white polygon (rectangle) with corners at (0.25, 0.25, 0.0) and
		 * (0.75, 0.75, 0.0)
		 */
		/* set color to white */
		GL11.glColor3f(1.0f, 1.0f, 1.0f);
		/* draw rectangle */
		GL11.glBegin(GL11.GL_POLYGON);
		GL11.glVertex3f(0.25f, 0.25f, 0.0f);
		GL11.glVertex3f(0.75f, 0.25f, 0.0f);
		GL11.glVertex3f(0.75f, 0.75f, 0.0f);
		GL11.glVertex3f(0.25f, 0.75f, 0.0f);
		GL11.glEnd();

	}

}
